Questions from Genetics

Q: What causes the cleavage furrow in an animal cell to ingress?

What causes the cleavage furrow in an animal cell to ingress?

Q: In Chapter 23, the technique of fluorescence in situ hybridization (

In Chapter 23, the technique of fluorescence in situ hybridization (FISH) is described. This is another method for examining sequence complexity within a genome. In this method, a DNA sequence, such a...

Q: In a P1 transduction experiment, the P1 lysate contains phages that

In a P1 transduction experiment, the P1 lysate contains phages that carry pieces of the host chromosomal DNA, but the lysate also contains broken pieces of chromosomal DNA (see Figure 7.10). If a P1 l...

Q: Can you devise an experimental strategy to get a P1 phage to

Can you devise an experimental strategy to get a P1 phage to transduce the entire genome of a λ (lambda) phage from one strain of bacterium to another strain? (Note: The general features of the reprod...

Q: Let’s suppose a new strain of P1 phage has been identified that

Let’s suppose a new strain of P1 phage has been identified that packages larger pieces of the E. coli chromosome. This P1 strain packages pieces of the E. coli chromosome that are 5 minutes long. If t...

Q: If two bacterial genes are 0.6 minute apart on the

If two bacterial genes are 0.6 minute apart on the bacterial chromosome, what cotransduction frequency would you expect to observe in a cotransduction experiment using P1 phage?

Q: In a cotransduction experiment involving P1, the cotransduction frequency was 0

In a cotransduction experiment involving P1, the cotransduction frequency was 0.53. How far apart are the two genes?

Q: In a cotransduction experiment using P1, the transfer of one gene

In a cotransduction experiment using P1, the transfer of one gene is selected for and the presence of the second gene is then determined. If 0 out of 1000 transductants that carry the first gene also...

Q: In a cotransformation experiment (see question 4 of More Genetic TIPS

In a cotransformation experiment (see question 4 of More Genetic TIPS), DNA was isolated from a donor strain that was proA+ and strC+ and sensitive to tetracycline. (The proA and strC genes confer the...

Q: In mice, a trait called snubnose is recessive to a wild

In mice, a trait called snubnose is recessive to a wild-type nose, a trait called pintail is dominant to a normal tail, and a trait called jerker (a defect in motor skills) is recessive to a normal ga...